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1. 宝山钢铁股份有限公司研究院,上海,201900
2. 宝钢股份梅钢公司制造管理部,南京,210039
收稿:2020-06-10,
网络首发:2022-05-09,
纸质出版:2020-05-09
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张建苏, 朱红丹. 700 MPa级高强热轧双相钢DP700的开发[J]. 特殊钢, 2020,41(6):77-80.
张建苏, 朱红丹. Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700[J]. Special Steel, 2020, 41(6): 77-80.
张建苏, 朱红丹. 700 MPa级高强热轧双相钢DP700的开发[J]. 特殊钢, 2020,41(6):77-80. DOI:
张建苏, 朱红丹. Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700[J]. Special Steel, 2020, 41(6): 77-80. DOI:
阐述了在宝钢梅山基地1780热轧机生产线上开发的700MPa级热轧双相钢DP700(/%:C 0.08~0.12
Si 0.08~0.12
Mn 1.30~1.150
P≤0.015
S≤0.005
Cr 0.50~0.70
Ca≥0.0015
Al≥0.015)工艺和性能
该钢板表面质量优良
屈服强度≥400 MPa
抗拉强度≥700 MPa
断后伸长率≥17%(b=20 mm
L
0
=80 mm)
扩孔率≥35%
50%存活率的疲劳极限达475 MPa。结果表明
DP700钢是一种具有良好应用前景的新型汽车零部件材料。
The process and properties of 700MPa grade hot rolled dual phase steel DP700 (/% : C 0.08 ~ 0.12
Si 0.08 ~0.12
Mn 1.30 ~ 1.150
P≤ 0.015
S ≤0
005
Cr 0.50 ~0.70
Ca ≥0.0015
Al≥0.015) development at Baosteel Meishan 1780 hot rolling mill are summarized. The developed plate has superior surface quality
its properties are Yield strength≥400 MPa
Tensile strength≥700 MPa
Elongation after fracture N≥ 17% (b = 20 mm
= 80 mm)
Hole expansion rate ≥35%
50% survival rate fatigue limit 475 MPa. Results show that the steel DP700 is one of new material for Auto industry with good application prospect.
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